This study proposes a regional seismic risk assessment procedure for critical disaster management facilities, such as hospitals and fire stations. A seismic risk index is defined by comparing the demand for disaster response resources, such as hospital beds and fire trucks, resulting from casualties and fires after an earthquake, with the reduced supply caused by earthquake-induced damage to these facilities. To account for changes in seismic design codes and facility retrofitting, seismic fragility functions were refined by adjusting the relevant capacity spectra. Although the assessment assumes uniform bedrock motion, it includes a method to adjust for spacial variations in seismic intensity within the target area. The procedure was applied to a metropolitan city in Korea, where regional seismic risk indices were calculated and key contributing factors analyzed. These indices can support prioritization of disaster response resource allocation and development of regional emergency response strategies against severe earthquakes.
Ahn et al. (Wed,) studied this question.
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